all my live rocks fell tonight along with my corals! And now all of a sudden there is this spiderweb like stuff all over the tank. On my corals, rocks and everything. What is this stuff and what do I do to get rid of it? I'm afraid it is going to kill everything. I had never seen it before. It's almost like it was under the rocks. Could it be from my feather duster?

this happened to me a few months ago when i was moving things around in the tank, i was told that something was spawning and that it wont kill or harm anything, and it will eventually disapate. i thought it was my feather dusters too because it happened right after i moved it, then i noticed it happening in a tank at the local fish store , and guess what, it was stuffed with featherdusters, so im pretty sure it was the featherduster spawning.